Thanks for all the replies. We checked the plumbing for the washer hookups and didn't find any sign of a leak there. We're fairly certain it's the slide leaking since we have soft floor at both ends. Could be that trim piece mentioned above. Ours is somewhat loose.
We'll find out soon enough. It's going in to our friends RV service center here in FL on Feb 21st. He gave us a much better quote than the Thor factory and I trust him to do an excellent job. Will post updates later.
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